ADWR administers or enforces all of the following EXCEPT which one?

The Arizona Department of Water Resources (ADWR) is primarily responsible for managing and regulating water resources in the state, which includes aspects such as groundwater management, surface water allocation, and conservation policies. Among the choices listed, the correct response identifies an area outside the scope of ADWR's regulatory authority.

Water quality standards are typically managed by the Arizona Department of Environmental Quality (ADEQ), rather than ADWR. While the ADWR does consider water quality in the context of water management and allocation, it does not set or enforce water quality standards directly. This responsibility falls under ADEQ, which focuses specifically on maintaining and regulating the quality of water resources to ensure safety and compliance with public health requirements.

Irrigation non-expansion areas, policies for water conservation and distribution, and the management of surface and groundwater resources are all within the jurisdiction of the ADWR. Therefore, the oversight of water quality standards is the area that distinguishes itself from the others as not being administered by ADWR.